Proceedings of the International Workshop "Quantum Entanglement in Physical and Information Sciences" Centro di Ricerca Matematica Ennio DeGiorgi, Scuola Normale Superiore; December 14—18, 2004, Pisa, Italy – Eds. C. Macchiavello, R. Fazio and G. M. PalmaNo Access

IMPLEMENTATION OF QUANTUM COMMUNICATION PROTOCOLS IN JOSEPHSON JUNCTION ARRAYS

ALESSANDRO ROMITO

NEST-INFM & Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy

Department of Condensed Matter Physics, The Weizmann Institute of Scienze, Rehovot 76100, Israel

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GABRIELE DE CHIARA

NEST-INFM & Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy

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DAVIDE ROSSINI

NEST-INFM & Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy

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, and

SIMONE MONTANGERO

NEST-INFM & Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy

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https://doi.org/10.1142/S0219749906001967Cited by:1 (Source: Crossref)

Abstract

We discuss simple protocols to realize state transfer with high fidelity in Josephson junction arrays. We consider both the cases of constant and properly modulated couplings between the site of the chain. We investigate the influence of static disorder both in the Josephson energies and in the coupling to the background gate charges and we show that they can lead to a fractal fidelity. We also analyze the readout process, and its backaction on the state transfer.

Keywords:

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